Richard Heyman, Ph.D. has served as a member of our board of directors since November 2015. Dr. Heyman is executive chairman and co-founder of Metacrine, Inc., a biotechnology company developing new therapeutics for the treatment of diabetes and related metabolic disorders. From August 2013 to April 2015, he served as president and chief executive officer of Seragon Pharmaceuticals Inc., or Seragon, a privately-held biotechnology company, which was acquired by Genentech in 2014. Prior to Seragon, in 2009 he co-founded and served as president and chief executive officer of Aragon Pharmaceuticals, Inc., or Aragon, until it was purchased by Johnson & Johnson in 2013. Earlier in his career, Dr. Heyman co-founded and served as chief scientific officer of X-Ceptor Therapeutics, Inc. and was vice president of research at Ligand Pharmaceuticals, Inc. He is the author or inventor on more than 120 publications and patents. Dr. Heyman serves as vice chairman of the board of trustees of the Salk Institute for Biological Studies, or the Salk Institute, and is a board member of BIOCOM Life Sciences Association of California. He is also a member of the Therapeutic Advisory Board for aTyr Pharma, Inc. and serves on the Executive Committee of the University of California, San Diego Moores Cancer Center. Dr. Heyman received a B.S. in chemistry from the University of Connecticut and a Ph.D. in pharmacology from the University of Minnesota. He was an NIH post-doctoral fellow and staff scientist at the Salk Institute. We believe that Dr. Heyman is qualified to serve on our board of directors due to his educational background and his experience as a board member and senior executive of biotechnology and pharmaceutical companies.